change section marker error

[hamdifem]

I give a part marker to a page

Then I want to give the part marker back to the same page

I'm getting an error

I can not change current (available) section marker

Error: This page already has another section

var w = new Window("dialog", "Section");
var panel = w.add('panel', undefined, "----");
var grup = panel.add('group', undefined, "");
grup.orientation = "row";
grup.add('statictext', undefined, "Page");
var sayfa = grup.add('edittext', [0, 0, 50, 25], "1")
grup.add('statictext', undefined, "Section Marker");
sayfa.graphics.font = "Tahoma:16";
var kisim_isaretcisi = grup.add('edittext', [0, 0, 50, 25], "A")
kisim_isaretcisi.graphics.font = "Tahoma:16";
kisim_isaretcisi.active = true;
w.add('button', undefined, 'Tamam', {name: 'OK'}).onClick = function() {
w.close(12345);
}
if(w.show() == 12345) {  
var doc = app.activeDocument;   
var ksm = kisim_isaretcisi.text;  
var syf = Number(sayfa.text);  
var addd = doc.sections.add(doc.pages.item(syf-1));
addd.marker = ksm;
}

[Peter Kahrel]

The message is clear: you can apply a section to a page only once. To apply a section again, first delete the section.

[hamdifem]

How to express it is or not part

if(part){  //part code ??

remove

}else{

add

}

[Peter Kahrel]

Sorry, I don't understand what you mean.

[hamdifem]

How can I query does it have section starting point in a page?

[Laubender]

Hi,

removing a section when found and adding a section with one single change perhaps in the value of the marker property is a bit "brute force" I think.

Nevertheless here a script snippet, that will remove and add a section, if the page of interest is already starting with a section. Adapt it to your needs:

/*
    Adds a section to the document beginning with the page of interest
    Removes and adds section if a section starts with the page of interest.
    IMPORTANT NOTES: 
    You cannot remove the section that starts on page one of every document.
    Removing and adding section is brute force, 
    if you only want to change e.g. a marker of an existing section.
*/
var doc = app.documents[0];
// The third page in the document:
var pageOfInterest = doc.pages[2];
// Gather all the pages where sections begin:
var pagesWhereSectionsStart = doc.sections.everyItem().pageStart;
var indexesOfPagesWithSection = [];
// Preparing an array to hold the indexes of the sections.
// The array's index however denotes the index of a page.
// indexesOfPagesWithSection[0] holds always value 0 
// because doc.sections[0] starts always on page 1 of a document.
// Example:
// If doc.pages[123] is the start of doc.sections[1], the second section in the document,
// the value of indexesOfPagesWithSection[123] is 1
// pagesWhereSectionsStart contains page objects.
// Loop that array:
for(var n=0;n<pagesWhereSectionsStart.length;n++)
{
    var indexOfSection = n;
    var indexOfPageWhereSectionStarts = pagesWhereSectionsStart.documentOffset;
    // Feed the array:
    indexesOfPagesWithSection[indexOfPageWhereSectionStarts] = indexOfSection;
};
var indexOfPageOfInterst = pageOfInterest.documentOffset;
if(indexOfPageOfInterst in indexesOfPagesWithSection)
{
    doc.sections[  indexesOfPagesWithSection[ indexOfPageOfInterst ]  ].remove();
};
var newSection = doc.sections.add(pageOfInterest);

Regards,
Uwe